An ambulance crew, from London transferring a patient to the hospital, were sent 200 miles in the wrong direction by a faulty satellite navigation system.
They were only supposed to go 12 miles to the hospital, a trip that should have taken 20 minutes. Instead, they went on an 8 hour round drip drive because they only paid attention to the ambulances navigation system.
All the technology we have is great. It will never replace common sense and brain power though.